grails - Grails:在Domain类中添加新字段会导致崩溃

Question

我有一个运行Grails 1.3.7的旧项目，在域类中(例如Patients)，我添加了一个新字段(禁用 bool(boolean) 值，nullable为true)。

class Hospital {
   hasMany = [patients: Patient]
   string name

class Patient 
   string name
   string address
   boolean disabled  // Added this new field

当我运行应用程序时，查询以获取所有属于医院的患者现在会抛出java.lang.IllegalArgumentException。删除新字段“已禁用”，应用程序运行正常。

基本上，导致该错误的代码类似于以下内容:

def h = Hospital.get(20)
h.patients   // This causes error below. No error if I remove the new field in domain

这是错误:

Stacktrace follows:
java.lang.IllegalArgumentException
    at com.x.model.Patient_$$_javassist_26.hashCode(Patient_$$_javassist_26.java)
    at java.util.HashMap.put(HashMap.java:372)
    at java.util.HashSet.add(HashSet.java:200)
    at java.util.AbstractCollection.addAll(AbstractCollection.java:305)
    at com.x.service.QueryService$_getPatientsByHospitals_closure13.doCall(QueryService.groovy:183)
    at com.x.service.QueryService.getPatientsByHospitals(QueryService.groovy:180)
    at com.x.service.QueryService$$FastClassByCGLIB$$a2fb92c6.invoke(<generated>)
    at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
    at com.x.service.QueryService$$EnhancerByCGLIB$$6756b2a.getPatientsByHospitals(<generated>)
    at com.x.service.QueryService$getPatientsHospitals.call(Unknown Source)
    at com.x.service.PatientsOverviewService.createSummaryRow(PatientsOverviewService.groovy:366)
    at com.x.service.PatientsOverviewService$_getPatientsSummaries_closure9.doCall(PatientsOverviewService.groovy:306)
    at com.x.service.PatientsOverviewService.getPatientsSummaries(PatientsOverviewService.groovy:296)
    at com.x.service.PatientsOverviewService$getPatientsSummaries.callCurrent(Unknown Source)
    at com.x.service.PatientsOverviewService.getPatientsOverview(PatientsOverviewService.groovy:50)
    at com.x.service.PatientsOverviewService$$FastClassByCGLIB$$15a92775.invoke(<generated>)
    at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)

com.x.ui.PatientsOverviewController $ _closure2.doCall(PatientsOverviewController.groovy)
在java.lang.Thread.run(Thread.java:662)

感谢您的帮助或建议。这已经困扰了我几个小时。

Answer 1

诸如boolean之类的原始类型的属性不能为空，您需要使用包装器类(Boolean)。